: Cho hình chóp S. ABCD , đáy ABCD là hình tứ giác lồi . Gọi M , N lần lượt là trung điểm của SB , SD .
Xác định giao tuyến của (SAD) và (SBC), (SAB) và (SCD)

Ateacher asked his students to vote for an animal to be their class pet. five-eighteenths of the students voted for a rabbit, voted for a snake, and voted for a hamster. which statement is true? more students voted for a hamster than a snake. more students voted for a snake than a rabbit. more students voted for a rabbit than a hamster. more students voted for a snake than a hamster.

Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg